Fuse plug



June 3 1924.-

G. H. BEGEHR FUSE PLUG Filed March 30. 1921 Patented June 3, 1924.

UNITED STATES GEORGE E. BEGEH R, OF CHICAGO, ILLINOIS.

FUSE PLUG.

Application filed March 30, 1921. Serial No 456,929.

To all whom it may concern;

Be i known that I, GEORGE H. BEGEHR, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Fuse Plugs, of which thefollowing is a specification, reference being had to the accompanyingdrawings, and to the reference characters marked thereon, which form apart of this specification.

. This invention relates to improvements in renewable fuse plugs.

In fuse plugs commonly in use, it is necessary, when the fuse is blown,to physically remove the entire plug from the fuse box to inspect itbefore ascertaining whether one has removed the blown fuse plug or aplug that has not been blown,fuse plugs being generally used inquantities. This entails a great deal of time and annoyance. Moreover,when the damaged plug has been found, it is necessary to insert a newplug in its place and to send the damaged plug to a factory to berenewed.

One of therobjects of my invention is to produce a plug with aslip-joint removable head, which may be readily detached from the plugso as toreveal the inside thereof, and enable the electrician todetermine at a glance whether or not the fuse of that particular plughas been blown. If so, then that plug may be removed; otherwise, theslipjoint head is instantly returned to its place, and the sameoperation repeated until the damaged plug is found.

Another object of the invention is to enablethe electrician to renewthis blown plug on the job by inserting a new piece of fuse wiretherein, thus very greatly lessening the cost to the operator of theplant and efl'ecting a great saving of time.

Another object of the invention is to produce a simple and efficientfuse plug of the character described, and one which will not readily getout of order or require any expert skill to operate or to renew.

To the attainment of the foregoing objects, the invention consists inthe devices and combinations ofdevices herein illustrated, described andclaimed.

In the drawings:

' Fig. 1 illustrates in a side elevation, a fuse plug embodying myinvention.

Fig. 2 is a longitudinal central sectional view of the plug, with thehead removed.

Fig. 3 is' a transverse sectional view,- taken in the plane indicated bythe dotted line 33 of Fig. 2.

Fig. 4 is an inside plan view of the cover member, removed.

Fig. 5 is a perspective view of the metallic contact plug. 7

Fig. 6 is a perspective view of the tubular socket member. In saiddrawings, A is the renewable fuse plug, as a whole, comprising acylindrical body 1 of hard rubber or other insulating material,exteriorly screw threaded at 2, having a flanged head 3, and a centralrecess 1, the latter being adapted to be covered by a removable member5. Recesses 6 in the head 3 and projections 7 on the cover member 5provide the familiar slip-joint or friction means for interlocking andseparating the cover member 5 and the head member 3. The screw threadedbody 1 is provided with a. metallic conductor sleeve 8. A pin 9, havinga head 10, is passed through a suitable aperture in the body 1 andprojects radially into the recess 4. The head 9 is rounded to conform tothe curvature of the screw' threads and the sleeve 8 holds the pin 9 inposition, as clearly shown in Figs. 2 and 3. The free end of the pin 9is provided with an elongated slot 11 adapted to receive and hold oneend of a fuse wire 12.

13 is a tubular socket member, secured by screw threads or othersuitable means, in one end of the body 1. A metallic contact plug 14,having a flanged head 15, is inserted in the bore of the socket member13. Its inner end is somewhat tapered at 16. It is provided with acentral recess 17, adapted to receive the fuse wire 12 and it is alsoprovided with one or more longitudinal slits 18, so that said taperedend is compressible.

The socket member 13 is hollow, to receive the plug 14, and its innerend is tapered complementally to the tapered end 16 of the plug.Therefore, when the plug 14 is inserted in the socket 13, the taperedend of the plug is contracted so as to grip or look about the end of thefuse wire 12 and support it in proper position.

When the fuse is blown, the insertion of a fresh fuse wire requires buta moments time, when the plug as a whole may be again used. Theadvantages are obvious.

I claim as my invention:

1. A renewable fuse plug comprising a recessed tubular body member,- aremovable cap member, a metal sleeve mounted upon the body, a metal pinonthe body in contact with said sleeve andv projecting into the recessof the body member, a contact plug in the end of the body member, a fusewire connecting the plug and the'pin, a tu bular socket member in thebody member surrounding said plug and having an inner tapered wall, thecontact plug being pro vided with a conical exterior surface on one endto engage the tapered wall of the socket V and being splitlongitudinallyto form 1: .silient gripping means for the end of the fusewire. V ,2. The renewable fuse plug described, comprising a hollow,cylindrical, exteriorly screw threaded body member of insulating end ofthe body being tapered and centrally .aper-tured, a metallic pinextending through L the body member radially and held in po sition bythe screw thread of said sleeve, a

cylindrical tubular sleeve centrally secured ,in the tapered end of thebody, a cont-act plug removably secured insaid sleeve, means forsecuring the endsof a fuse wire, one to the contact pin and the other tothe vplug. 3. The renewable fuse Aplug described,

comprising a hollow, cylindrical, exteriorly screw threaded body memberof insulating material, a flanged head thereon centrally apertured toafford communication with the interiorof thebod'y, a metallic sleevemember'upon the screw threaded portion of the body, a cap member havingremovable connection. with. the body member, the other end of the bodybeing tapered and centrally apertured, a metallic pin extending throughthe body member radially and held .in position by the screw thread ofsaid sleeve, a cylindrical tubular sleeve centrally secured inthetapered end of the body,.

a contact plu removably secured in said sleeve, means or securing theends of a fuse wire, one to the contact pin and the other to the plug,sald securing means lncluding longitudinal slits extending part way intothecontact plugfrom its free end, and cooperative means between saidplug and its surrounding sleeve whereby the slitted end of the plug isclamped to one end of the fuse wire. i

asmy invention allix my signature, in the presenceof .two witnesses,this 23rd day of March, 1921-. i

WVitnesses: s

T YLOR E BROWN, B. L. MACGREGOR- In testimony, :that I, claimv theforegoing GEORGE BEGEHR." I

